36 Butstillthereisadangerthatgrowseveryyear.Airlinersge...
问题详情:
36 But still there is a danger that grows every year.Airliners get larger.Some airplanes can hold over 300 passengers.And the air itself becomes more and more crowded.If one giant airliner crashed into another in mid-air 600 lives could be lost. 37 Air traffic controllers tell the pilot exactly when to turn when to climb and when to come down.The air traffic controllers around a busy airport like London-Heathrow may handle 2500 planes a day.Not all of them actually land at the airport.Many plane that flies near the airport comes under the orders of the controllers there. 38. Recently such a disaster almost happened. 39 . One with 69 passengers had come from Toronto and the other with 176 passengers from Chicago ,an air traffic controller noticed on his radar screen that the two planes were too close to each other.He ordered one to turn to the right and to climb.But he made a mistake.He ordered the wrong plane to do this.Fifteen seconds later it flew directly in front of the second plane.They avoided each other by the smallest part of a second.The distance between them was less than that of a large swimming pool. 40 .
A. Even a small mistake on their part could cause a disaster.
B. Two large jets were flying towards the airport.
C. Nowadays people like traveling more by air than by car.
D. Today air travel is far safer than driving a car on a bus motor-way.
E. This is an example of the danger that grows every year.
F. In a word air travel is more dangerous we should choose others.
G. From the moment an airliner takes off to the moment it lands, every movement is watched on radar screen
【回答】
DGABE
知识点:七选五题型
题型:未分类
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已知铁的一种氧化物,其中含氧元素的质量分数为30%,则这种铁的氧化物的化学式为 ( ) A.FeO ...
问题详情:已知铁的一种氧化物,其中含氧元素的质量分数为30%,则这种铁的氧化物的化学式为()A.FeO B.Fe2O3C.Fe3O4 D.无法判断【回答】B知识点:金属的化学*质题型:选择题...
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如图,形状相同、大小相等的两个小木块放在一起,其俯视图如图所示,则其主视图是( ).
问题详情:如图,形状相同、大小相等的两个小木块放在一起,其俯视图如图所示,则其主视图是( ).【回答】D知识点:三视图题型:选择题...
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简答题(选做一题)(5分)20.阅读下面《红楼梦》选段,依据原著故事情节,回答问题。一句话未了,忽见一个老婆子...
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如图中,A、B、C、D、E是单质,G、H、I、F是B、C、D、E分别和A形成的二元化合物,已知:①反应C+G ...
问题详情:如图中,A、B、C、D、E是单质,G、H、I、F是B、C、D、E分别和A形成的二元化合物,已知:①反应C+G B+H能放出大量的热,G是红综*固体粉末;②I是一种常见的温室气体,它和E可以发生反应:2E+I2F+D,F中的E元素的质量分数为60%.回答问题: ⑴①中反应的化学方程式为 ...
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